After we download the IOS image and move it to the switch, we’ll verify the MD5 checksum before installing the image. While you are on this download page, copy/paste the MD5 given to your system. Go to -> IOS Software -> Select your Siwtch (for example: Cisco Catalyst Switch 3750G-24T) -> Click on “Download IP BASE” -> Select the latest version that you want to download (for example: 12-2.55.SE1). Download Latest IOS Image from Cisco Websiteĭownload the latest IOS image for your cisco website As you see below, it is using “12.3(35)SE5” # show ver Most likely this will be same as the current IOS image file that you see in your flash card. Verify what version of IOS image your switch is currently running. # dir flash1:Īs you see above, both the flash cards contains the current IOS image file, which is version “122.35.SE5” If you have only one cisco catalyst switch (non stack mode), follow all the steps mentioned in this document, but you’ll be doing it only on one flash card.įirst, verify the content of the flash cards, using “dir flash1:” command. Switch# Role Mac Address Priority Version State Switch/Stack Mac Address : 0012.abcd.1234 So, while upgrading you should upgrade the image on both the flash cards. This example uses two cisco catalyst 3750 switches configured in stack mode as shown below. Verify Current IOS VersionĪfter you login, go to enable mode, by entering the enable password. However this examples shows how to upgrade ios image on a cisco catalyst switch. Please note that the steps given below will be similar to both switches and routers. Use a console cable to connect to the switch.

Since you’ll be upgrading the IOS image, make sure you have physical access to the switch and you are in front of it. This article explains 7 easy steps to upgrade IOS image on a cisco switch or router. Anytime Cisco releases a new IOS image for its network switch (or router), it is recommended that you upgrade it.

Cisco switch 3750 ios image download